CAUCKernel类参考


详细描述

The AUC kernel can be used to maximize the area under the receiver operator characteristic curve (AUC) instead of margin in SVM training.

It takes as argument a sub-kernel and Labels based on which number of positive labels times number of negative labels many ``virtual'' examples are created that ensure that all positive examples get a higher score than all negative examples in training.

在文件AUCKernel.h33行定义。

继承图,类CAUCKernel
Inheritance graph
[图例]

所有成员的列表。

公有成员

 CAUCKernel (int32_t size, CKernel *subkernel)
virtual ~CAUCKernel ()
CLabelssetup_auc_maximization (CLabels *labels)
virtual bool init (CFeatures *l, CFeatures *r)
virtual EKernelType get_kernel_type ()
virtual const char * get_name () const

保护成员

virtual float64_t compute (int32_t idx_a, int32_t idx_b)

保护属性

CKernelsubkernel

构造及析构函数文档

CAUCKernel ( int32_t  size,
CKernel subkernel 
)

constructor

参数:
size cache size
subkernel the subkernel

在文件AUCKernel.cpp20行定义。

~CAUCKernel (  )  [virtual]

destructor

在文件AUCKernel.cpp26行定义。


成员函数文档

float64_t compute ( int32_t  idx_a,
int32_t  idx_b 
) [protected, virtual]

compute kernel function for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object

参数:
idx_a index a
idx_b index b
返回:
computed kernel function at indices a,b

实现了CKernel

在文件AUCKernel.cpp119行定义。

virtual EKernelType get_kernel_type (  )  [virtual]

return what type of kernel we are

返回:
kernel type AUC

实现了CKernel

在文件AUCKernel.h66行定义。

virtual const char* get_name (  )  const [virtual]

return the kernel's name

返回:
name AUC

实现了CSGObject

在文件AUCKernel.h72行定义。

bool init ( CFeatures l,
CFeatures r 
) [virtual]

initialize kernel

参数:
l features of left-hand side
r features of right-hand side
返回:
if initializing was successful

重载CSimpleKernel< uint16_t >

在文件AUCKernel.cpp112行定义。

CLabels * setup_auc_maximization ( CLabels labels  ) 

initialize kernel based on current labeling and subkernel

参数:
labels - current labeling
返回:
new label object to be used together with this kernel in SVM training for AUC maximization

在文件AUCKernel.cpp32行定义。


成员数据文档

CKernel* subkernel [protected]

the subkernel

在文件AUCKernel.h87行定义。


该类的文档由以下文件生成:

SHOGUN Machine Learning Toolbox - Documentation